JP3242312U - Integrated monitor of power bus status for closed-loop communication - Google Patents

Abstract

An integrated monitor of power bus status for closed-loop communications. The method includes a microprocessor, a shaping and measuring module, a signal conditioning module, a communication module, and an A/D converter, wherein the shaping and measuring module shapes the collected state signal and then transmits it to the microprocessor to obtain the signal The adjustment module adjusts the collected second signal and then sends it to the A/D converter, and the A/D converter converts the adjusted second signal into a digital signal and then sends the digital signal to the microprocessor. . Telemetry signals such as the DC input voltage of the DC/DC module, the communication power supply bus voltage, and the bus output current can be measured in real time. , telemetry signals such as telecommunications power busbar feeder line trip total alarm signals can be actually and effectively measured. [Selection drawing] Fig. 1

Description

TECHNICAL FIELD The present invention relates to the technical field of substation communication power supply monitoring, and more particularly to integrated monitoring of closed-loop communication power supply bus status.

The bus state monitoring of the communication power supply of the existing integrated power supply only includes the module voltage and module current of the DC/DC communication power supply module, and the telemetry signals such as the DC input voltage, DC output voltage and DC output current of the bus All not actually measured. The communication power bus of the existing integrated power supply is controlled by an open loop, and when overvoltage and undervoltage faults occur on the communication power bus, the true state of the communication power bus can be accurately fed back. If not, the problem can be discovered only when the communication power bus completely loses voltage.

Therefore, there is a need to provide a new closed-loop communication power bus status integrated monitor to solve the above technical problems.

The technical problem to be solved by the present invention is to overcome the shortcomings in the above-mentioned prior art, and to solve the problem of the prior art that it is difficult to actually measure the true state of the communication power supply bus. The purpose of the present invention is to disclose an integrated monitor of the state of the power supply bus.

The technical means adopted by the present invention to solve the above technical problems are as follows: a closed-loop communication power bus status integrated monitor, comprising a microprocessor, a shaping and measuring module, a signal conditioning module; comprising a communication module and an A/D converter, wherein the shaping and measuring module is used to shape the collected state signal and then send it to the microprocessor; and the signal conditioning module is used to condition the collected second signal. and then transmitting to an A/D converter, the A/D converter converting the adjusted second signal into a digital signal and then transmitting the digital signal to a microprocessor, wherein the microprocessor The processor is connected to the terminal device via a communication module.

Preferably, further comprising an alarm output module, said alarm output module being communicatively connected to the microprocessor, said alarm output module being used to emit an alarm signal.

Preferably, an external memory chip is further included, and the external memory chip is used to store data.

Preferably, the signal conditioning module includes a micro-transformer and a filter for converting the second signal into a voltage signal of predetermined volts, wherein the voltage signal of predetermined volts is A/D after being filtered. sent to the converter.

Preferably, the second signal includes a DC input voltage of the DC/DC module, a communication power bus voltage, and a bus output current signal.

Preferably, the first signal includes an open/close state of a communication power supply DC incoming line, an open/close state of a communication power supply module busbar output line, and a communication power supply busfeeder line trip total alarm signal.

Preferably, the external memory chip includes an EEPROM chip and a FLASH chip, and the EEPROM chip stores electrical angles, various threshold parameters, communication addresses, and IP address settings. The FLASH chip is used to store various statistical data.

Preferably, the communication module includes local communication using SCI and remote communication using 4G, 5G.

Preferably, the alarm output module uses a relay to output hard contact alarms.

Preferably, a display module is further included, said display module being communicatively connected to the microprocessor, said display module being used to display content sent from the microprocessor.

The present invention has the following advantages over the prior art,
First, the monitor provided by the present invention eliminates the defects in the operation of the communication power bus of the current integrated power supply, other products are not true feedback measurement or use undervoltage relay The product achieves true and effective feedback and monitoring, and achieves closed-loop control of communication power bus. Specifically, telemetry signals such as the DC input voltage of the DC/DC module, the communication power supply bus voltage, and the bus output current can be measured in real time. Line open/close conditions and telemetry signals such as telecommunication power busbar feeder line trip total alarm signals can be actually and effectively measured, and the collected data can be uploaded to the terminal.

Second, the structure is compact, the site-installed construction conditions are fully considered, and an integrated measuring instrument covers multiple measurement modules or relays, reducing field wiring and construction difficulty.

Third, the alarm format is diverse, and the alarm information can be output through hard contact, and can be uploaded to the background through the communication module (MOBUS and IEC61850 mode), and the new and old substations at different times can be adapted to the improvement of

1 is a structural block diagram of the present invention; FIG.

Hereinafter, the present utility model will be described in detail based on each embodiment shown in the drawings. Or structural equivalent transformations or substitutions are all within the protection scope of this utility model.

Referring to FIG. 1, which shows a specific embodiment of the present invention, as shown in the figure, the closed-loop communication power bus status integrated monitor disclosed in the present invention comprises a microprocessor, a shaping and measuring module, A signal conditioning module, a communication module, and an A/D converter, wherein the shaping measurement module is communicatively connected to the shaping measurement module, the communication module, and the A/D converter, respectively; 1 signal is sent to the microprocessor after shaping, this setting is used to shape the first signal and complete the initial processing, because the voltage range of the first signal collected exceeds the tolerance of the microprocessor. and then sent to the microprocessor for decision making. The signal conditioning module is used to condition the sampled second signal and then send it to the A/D converter, this setting ensures that the voltage-current range of the sampled second signal exceeds the allowable range of the A/D converter. so that the second signal is adjusted, the A/D converter converts the adjusted second signal into a digital signal, and then the digital signal is sent to the microprocessor, and the microprocessor is sent to the terminal device through the communication module Connected. The DSP is integrated in the microprocessor, which is responsible for the calculation and processing of the entire data, central control of the entire system, and scheduling of other modules. In this embodiment, the microprocessor adopts TMS320F28034.

As another embodiment of the present invention, this embodiment further includes an alarm output module, the alarm output module is communicatively connected to the microprocessor, the alarm output module is used to emit an alarm signal, specifically: , the alarm output module uses a relay to issue a hard contact alarm, and when the alarm output module finds that an abnormal event has occurred in the collected data related to TMS320F28034, it will send an alarm signal to the outside to inform the user Detect abnormal situations. For example, if a telemetry signal value exceeds a limit and outputs an alarm node, the monitor of the present embodiment can control up to 7-way hard contact output alarms.

As another embodiment of the present invention, this embodiment includes an external memory chip, and the external memory chip is used to store data. Specifically, the external memory chip mainly stores parameters such as electric power and various threshold values, EEPROM chip 24LC16 for storing communication settings such as communication addresses and IP addresses, and various statistical data. Includes FLASH chip 39VF1601 for periodic erasing and updating.

The signal conditioning module includes a micro-transformer and a filter, where the filter is a first order RC filter. First, the voltage/current signal is converted to a voltage signal with an amplitude of about 0.5 V through a highly linear micro-transformer, and then first-order RC filtered to the A/D converter. Input.

Specifically, the AD73360L is adopted as the A/D converter, and the AD73360L is a general-purpose 6-channel, 16-bit Σ-Δ type ADC that can be controlled by a program released by ADI. Its main features are:
First, there is mutual isolation between the six sampling channels, each containing a complete signal shaping circuit and an on-chip input gain amplifier, which is programmable and allows the input of analog signals of low electrical level amplitude. be. Each channel performs synchronous sampling to ensure no delay between channels. The SNR within 4kHz range of each channel can reach 76dB, and all channels feature low group delay.

Second, it adopts synchronous serial port transmission, the ADC's front-end sampling frequency and back-end transmission speed can be programmatically controlled (the highest sampling can support 64kHz), and can be connected with high-speed DSP or other low-speed MCU In particular, it is fully compatible with the TMS320F28034 McBSP module and easy to communicate, making it very convenient regardless.

Third, the operation mode can be selected from data mode, program mode, and program/data mixed mode, which is suitable for various measurement locations.

Fourth, the chip has a reference voltage within the chip, the allowable input power supply range is from 2.7V to 3.6V, and the power consumption is relatively low, and the typical value of the chip reference voltage is 1.2V. is.

Specifically, the second signal includes a DC input voltage of the DC/DC module, a communication power bus voltage, and a bus output current signal. After the signal conditioning module completes the conditioning of the second signal, the result is calculated by the microprocessor after completing the conversion through the AD73360L sampling chip. Therefore, telemetry signals such as the DC input voltage of the DC/DC module, the communication power supply bus voltage, and the bus output current can be measured in real time.

Specifically, the first signal includes an open/close state of the communication power supply DC input line, an open/close state of the communication power supply module bus output line, and a communication power supply bus feeder line trip total alarm signal, and the shaping measurement module , After completing the above information collection and formatting, the microprocessor completes the judgment and obtains the status collection result, thereby determining the open/close status of the communication power supply DC input line and the open/close status of the communication power supply module bus output line. and the function of measuring telemetry signals, such as telecommunications power busbar feeder line trip gross alarm signals.

Specifically, the communication module includes local communication and remote communication, where the local communication is SCI 232 and 485 communication, and data can be transcribed with a hand copier. Remote communication is 4G, 5G transmission module. The communication module is used to send data to the master computer as well as receive various parameter settings. The communication module completes transfer of collected data and upload of alarm data under control of TMS320F28034.

In another embodiment of the utility model, the monitor is provided with a display module and a keyboard, the display module and the keyboard are communicatively connected to the microprocessor, and the keyboard and the display module serve input and output roles respectively. , the keyboard feeds back the user's operation to the TMS320F28034, and the display module is responsible for displaying to the user what the TMS320F28034 needs to display.

After the monitor powers up and performs system initialization and self-tests, the signal conditioning module conditions the second signal to a signal that the AD73360L can allow, the AD73360L completes analog-to-digital conversion of the second signal, and then Transmit the converted digital signal to TMS320F28034 to complete the telemetry signal calculation by TMS320F28034. The shaping measurement module shapes the first signal so that the first signal matches the input range of the TMS320F28034, and after the shaped first signal is transmitted to the TMS320F28034, the telemetry signal is judged by the TMS320F28034. When TMS320F28034 finds that an abnormality has occurred in the relevant collected data, it will control the alarm output module to output the alarm node or upload it to the terminal device through the communication module to notify the user of the occurrence of the alarm event. , in the process, records the data it needs to store in an external memory chip. The TMS320F28034 transfers relevant data through the communication module, and when the user retrieves the data, transfers it to the TMS320F28034 through the communication module.

Reconfigures all modules in the system, disables unused peripherals and interrupts, initializes communication and display modules, removes all capacitor groups, and completes a power-off record at every power-up There is a need to. Complete functions such as telemetry signals every main cycle of the system. In general, when real-time requirements such as relay protection are high, the refresh time of system calculation data should be as short as possible.

The monitor provided by the present invention eliminates the defects in the operation of the communication power bus of the current integrated power supply, and other products are not actually measured by feedback, or are obtained by using undervoltage relays. Yes, the product achieves true and effective feedback and monitoring, and achieves closed-loop control of the communication power bus. Specifically, telemetry signals such as the DC input voltage of the DC/DC module, the communication power supply bus voltage, and the bus output current can be measured in real time. Line open/close conditions and telemetry signals such as telecommunication power busbar feeder line trip total alarm signals can be actually and effectively measured, and the collected data can be uploaded to the terminal.

Second, the structure is compact, the site-installed construction conditions are fully considered, and an integrated measuring instrument covers multiple measurement modules or relays, reducing field wiring and construction difficulty.

Third, the alarm format is diverse, and the alarm information can be output through hard contact, and can be uploaded to the background through the communication module (MOBUS and IEC61850 mode), and the new and old substations at different times can be adapted to the improvement of

The above series of detailed descriptions are only specific descriptions of possible embodiments of the present invention, and are not used to limit the protection scope of the present invention, but rather the technical spirit of the present invention. Equivalent embodiments or modifications that do not deviate from should fall within the protection scope of the present invention.

In addition, although the present specification is described according to the embodiments, each embodiment does not include only one independent technical idea, and such description forms in the specification are merely for clarity, and those skilled in the art may It should be understood that the specification should be taken as one whole, and the technical solutions of each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims (10)

comprising a microprocessor, a shaping and measuring module, a signal conditioning module, a communication module and an A/D converter, wherein the shaping and measuring module is used to shape the collected first signal and then send it to the microprocessor; wherein the signal conditioning module is used to condition the collected second signal and then send it to an A/D converter, and the A/D converter converts the conditioned second signal into a digital signal. 1. An integrated monitor of the closed-loop communication power bus status, which is used to transmit a digital signal to a microprocessor, and the microprocessor is connected to a terminal device through a communication module. The closed-loop communication of claim 1, further comprising an alarm output module, wherein the alarm output module is communicatively connected to the microprocessor, and the alarm output module is used to emit an alarm signal. Integrated monitor of power bus status. 2. The integrated monitor of power bus status for closed loop communication as claimed in claim 1, further comprising an external memory chip, said external memory chip being used for storing data. The signal conditioning module includes a micro-transformer and a filter for converting the second signal into a voltage signal of a predetermined volt, the voltage signal of the predetermined volt being filtered and then sent to an A/D converter. 2. The integrated monitor of the power bus status for closed-loop communication according to claim 1, wherein: 5. The integrated closed loop communication power bus status of claim 4, wherein the second signal comprises a DC input voltage of the DC/DC module, a communication power bus voltage, and a bus output current signal. conversion monitor. 2. The apparatus according to claim 1, wherein said first signal includes an open/close state of a communication power supply DC input line, an open/close state of a communication power supply module busbar output line, and a communication power supply busfeeder line trip total alarm signal. Integrated monitor of power bus status for closed loop communication as described. The external memory chip includes an EEPROM chip and a FLASH chip, and the EEPROM chip is used to store electrical angles, various threshold parameters, communication addresses, and IP address settings; 4. The integrated monitor of power bus status for closed-loop communication as claimed in claim 3, wherein said FLASH chip is used to store various statistical data. The integrated monitor of power bus status for closed-loop communication of claim 1, wherein the communication module includes local communication using SCI and remote communication using 4G, 5G. 3. The integrated monitor of the closed-loop communication power bus status of claim 2, wherein the alarm output module uses a relay to output a hard contact alarm. The closed-loop type of claim 1, further comprising a display module, said display module being communicatively connected to the microprocessor, said display module being used to display content sent from the microprocessor. Integrated monitor of communication power supply bus status.

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